Insulator



(No Model.)

y R vM. LoGKE.

INSULATOR.

Patented Oct. 11, 1892.

rnc aus uns en., Munn, wwwrun, a c.

UNITED STATES PATENT OFFICE.

FRED M. LOCKE,OF VICTOR, NEW YORK.

iNsuLAVToR..

SPECH'ICATION forming part of Letters Patent No. 484,209, dated October 11, 1892.

Application and my 13, 1891.

To all whom it may concern:

Be it known that I, FRED M. Locks, of Victor, in the county of Ontario, in the State of New York, have invented new and useful Improvements in Insulators, of which the follow ing, taken in connection with the accompanying drawings, is a full, clear, and exact description.

Myinventiou relates to insulators which are provided' with a projecting threaded shank adapted to attach them to acrossarm, either on the upper or lower side, and' in which provis ion ismade' to reduce the actual bearing of said shank in or against the walls of the cavity in the insulating material, and in which this material is provided with skirts and alsoA with a skirt-coverwhen the insulator is pendent from the cross-arm.

My object is to produce a more perfect in sulator not adected by storms of rain or sleet, in which the shank is more securely fastened in the insulating-cap and its metallic contact.

therewith is reduced toa minimum, in which the' insulating`cap is'provided with skirts to prevent the flow of electricity from the wire over the wet exterior of the cap onto the shank, and in which when the insulator is pendent from a cross-arma cover is provided to prot-ect the skirts and keep them dry.

My invention consists i n the several novel features of construction and operation hereinaft'er described, and which are specically set torth in the claims hereunto annexed. It is constructed as follows, reference being had to the 'accompanying drawings, in which-- Figure 1 is a side elevation of part of a cross-armprovid'ed with two of 'my insulators, oneA upright upon it and the other inverted and pendent from the underside thereof and provided with a cover to protect the skirtface of the insulatlng-cap fitting around the shank. Fig. 2 is a vertical sectional elevation of thel insulator and cross-arm shown below said arm in Fig. 1. Fig. 3 is a like view of the insulator shown upright upon the top of the cross-arm in Fig. 1. Fig. 4 is a top plan of the insulator'skirt-cover, showing the shank through it iu cross-section on the line of the lower face of the cross-arm in Fig. :3.

Serial No. 399,284. (No model.)

Fig. 5 is a cross-section of the shank on line a; :c in Fig. 3, showing the chamber therein.

A is the insulating-cap, constructed of glass, mica, or other non-conducting material and provided with a central recess 1 and multiple skirts 2, created by the concentric grooves shown between them in the larger end of the cap. Its exterior surface is provided with a circumferential groove, as shown, to receive .the wire. .v

B is the metallic shank, having one end` cylindrical, or substantially so, and threaded for securing the shank to the cross-arm, having a ange .or shoulder 3, which bears against the crossarm and gives lateral support, and having its outer end channeled longitudinally from the shoulder or adjacent thereto lo the extremity, and also having the ridged edges thus created threaded or corrugated transversely. This channeled end of the shank is inserted into the recess in the cap and secured therein by iie'lted ulphur or wax or other material poured in around it., fillingsaid channels for part of Atheir length-say one-'halfand also filling the threads orcorrugalionsin the ridges and rigidly securing it in tho cap. Y \Vhen mounted upright upon the rossa-rm, the skirts operate in tho usual manner to increase the insulation and protect that. endof the cap from water or slcel; hut when in- 'verted and pendent from the cross-arm the skirt-grooves would operate as so many cups to hold water, and lo keep out this and proteef; the skirts I use the cover C, consisting of acricavoconycx piece of insulating material perforated centrally to receive the cylindrical end of the shank upto the shoulder thereon, andthis cover is secu red in place by said shan k and` its shoulder, and its edge ovcrhangs the cap and the skirts thereon and elfcctually shuts ont the water from that end of the cap.

It will be evident that I can thread the shank as a wood-,screw as shown, or in 'an y other manner desired, and can also omit the corrugations in the ridges upon the end in-V serted into the csp.

What I claim as ny invention, and desire to secure by Letters Patent, is-

1. An insulator shank having one end threaded and theothereud solid and channeled longitudinally and .corrugated transversely and provided with a central flange.

3. The combination, with an inverted insulator-cap audtssupporti'g-shankprovided. with a. flange, of a conca 'vo-convex cover u1- closing part of the cap and secured by the xo (lange engaging under it and the shank passing through it.

In witness whereof l have hereunto set Amy hand this 15th day-of June, 1891.

FRED M. LOCKE- In presence ol- Z. (I. CURTICE, A G. li. SEARL. 

